Home Home > GIT Browse
summaryrefslogtreecommitdiff
blob: 98b30c1613b28031c27a35990510a2bafc0697c4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef INCLUDE_XEN_OPS_H
#define INCLUDE_XEN_OPS_H

#include <linux/percpu.h>
#include <linux/notifier.h>
#include <linux/efi.h>
#include <xen/features.h>
#include <asm/xen/interface.h>
#include <xen/interface/vcpu.h>

DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu);

DECLARE_PER_CPU(uint32_t, xen_vcpu_id);
static inline uint32_t xen_vcpu_nr(int cpu)
{
	return per_cpu(xen_vcpu_id, cpu);
}

#define XEN_VCPU_ID_INVALID U32_MAX

void xen_arch_pre_suspend(void);
void xen_arch_post_suspend(int suspend_cancelled);

void xen_timer_resume(void);
void xen_arch_resume(void);
void xen_arch_suspend(void);

void xen_reboot(int reason);

void xen_resume_notifier_register(struct notifier_block *nb);
void xen_resume_notifier_unregister(struct notifier_block *nb);

bool xen_vcpu_stolen(int vcpu);
void xen_setup_runstate_info(int cpu);
void xen_time_setup_guest(void);
void xen_manage_runstate_time(int action);
void xen_get_runstate_snapshot(struct vcpu_runstate_info *res);
u64 xen_steal_clock(int cpu);

int xen_setup_shutdown_event(void);

extern unsigned long *xen_contiguous_bitmap;

#if defined(CONFIG_XEN_PV) || defined(CONFIG_ARM) || defined(CONFIG_ARM64)
int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order,
				unsigned int address_bits,
				dma_addr_t *dma_handle);

void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order);
#else
static inline int xen_create_contiguous_region(phys_addr_t pstart,
					       unsigned int order,
					       unsigned int address_bits,
					       dma_addr_t *dma_handle)
{
	return 0;
}

static inline void xen_destroy_contiguous_region(phys_addr_t pstart,
						 unsigned int order) { }
#endif

#if defined(CONFIG_XEN_PV)
int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr,
		  xen_pfn_t *pfn, int nr, int *err_ptr, pgprot_t prot,
		  unsigned int domid, bool no_translate, struct page **pages);
#else
static inline int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr,
				xen_pfn_t *pfn, int nr, int *err_ptr,
				pgprot_t prot,  unsigned int domid,
				bool no_translate, struct page **pages)
{
	BUG();
	return 0;
}
#endif

struct vm_area_struct;

#ifdef CONFIG_XEN_AUTO_XLATE
int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
			      unsigned long addr,
			      xen_pfn_t *gfn, int nr,
			      int *err_ptr, pgprot_t prot,
			      unsigned int domid,
			      struct page **pages);
int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
			      int nr, struct page **pages);
#else
/*
 * These two functions are called from arch/x86/xen/mmu.c and so stubs
 * are needed for a configuration not specifying CONFIG_XEN_AUTO_XLATE.
 */
static inline int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
					    unsigned long addr,
					    xen_pfn_t *gfn, int nr,
					    int *err_ptr, pgprot_t prot,
					    unsigned int domid,
					    struct page **pages)
{
	return -EOPNOTSUPP;
}

static inline int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
					    int nr, struct page **pages)
{
	return -EOPNOTSUPP;
}
#endif

int xen_remap_vma_range(struct vm_area_struct *vma, unsigned long addr,
			unsigned long len);

/*
 * xen_remap_domain_gfn_array() - map an array of foreign frames by gfn
 * @vma:     VMA to map the pages into
 * @addr:    Address at which to map the pages
 * @gfn:     Array of GFNs to map
 * @nr:      Number entries in the GFN array
 * @err_ptr: Returns per-GFN error status.
 * @prot:    page protection mask
 * @domid:   Domain owning the pages
 * @pages:   Array of pages if this domain has an auto-translated physmap
 *
 * @gfn and @err_ptr may point to the same buffer, the GFNs will be
 * overwritten by the error codes after they are mapped.
 *
 * Returns the number of successfully mapped frames, or a -ve error
 * code.
 */
static inline int xen_remap_domain_gfn_array(struct vm_area_struct *vma,
					     unsigned long addr,
					     xen_pfn_t *gfn, int nr,
					     int *err_ptr, pgprot_t prot,
					     unsigned int domid,
					     struct page **pages)
{
	if (xen_feature(XENFEAT_auto_translated_physmap))
		return xen_xlate_remap_gfn_array(vma, addr, gfn, nr, err_ptr,
						 prot, domid, pages);

	/* We BUG_ON because it's a programmer error to pass a NULL err_ptr,
	 * and the consequences later is quite hard to detect what the actual
	 * cause of "wrong memory was mapped in".
	 */
	BUG_ON(err_ptr == NULL);
	return xen_remap_pfn(vma, addr, gfn, nr, err_ptr, prot, domid,
			     false, pages);
}

/*
 * xen_remap_domain_mfn_array() - map an array of foreign frames by mfn
 * @vma:     VMA to map the pages into
 * @addr:    Address at which to map the pages
 * @mfn:     Array of MFNs to map
 * @nr:      Number entries in the MFN array
 * @err_ptr: Returns per-MFN error status.
 * @prot:    page protection mask
 * @domid:   Domain owning the pages
 * @pages:   Array of pages if this domain has an auto-translated physmap
 *
 * @mfn and @err_ptr may point to the same buffer, the MFNs will be
 * overwritten by the error codes after they are mapped.
 *
 * Returns the number of successfully mapped frames, or a -ve error
 * code.
 */
static inline int xen_remap_domain_mfn_array(struct vm_area_struct *vma,
					     unsigned long addr, xen_pfn_t *mfn,
					     int nr, int *err_ptr,
					     pgprot_t prot, unsigned int domid,
					     struct page **pages)
{
	if (xen_feature(XENFEAT_auto_translated_physmap))
		return -EOPNOTSUPP;

	return xen_remap_pfn(vma, addr, mfn, nr, err_ptr, prot, domid,
			     true, pages);
}

/* xen_remap_domain_gfn_range() - map a range of foreign frames
 * @vma:     VMA to map the pages into
 * @addr:    Address at which to map the pages
 * @gfn:     First GFN to map.
 * @nr:      Number frames to map
 * @prot:    page protection mask
 * @domid:   Domain owning the pages
 * @pages:   Array of pages if this domain has an auto-translated physmap
 *
 * Returns the number of successfully mapped frames, or a -ve error
 * code.
 */
static inline int xen_remap_domain_gfn_range(struct vm_area_struct *vma,
					     unsigned long addr,
					     xen_pfn_t gfn, int nr,
					     pgprot_t prot, unsigned int domid,
					     struct page **pages)
{
	if (xen_feature(XENFEAT_auto_translated_physmap))
		return -EOPNOTSUPP;

	return xen_remap_pfn(vma, addr, &gfn, nr, NULL, prot, domid, false,
			     pages);
}

int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
			       int numpgs, struct page **pages);

int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr,
				  unsigned long nr_grant_frames);

bool xen_running_on_version_or_later(unsigned int major, unsigned int minor);

efi_status_t xen_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc);
efi_status_t xen_efi_set_time(efi_time_t *tm);
efi_status_t xen_efi_get_wakeup_time(efi_bool_t *enabled, efi_bool_t *pending,
				     efi_time_t *tm);
efi_status_t xen_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm);
efi_status_t xen_efi_get_variable(efi_char16_t *name, efi_guid_t *vendor,
				  u32 *attr, unsigned long *data_size,
				  void *data);
efi_status_t xen_efi_get_next_variable(unsigned long *name_size,
				       efi_char16_t *name, efi_guid_t *vendor);
efi_status_t xen_efi_set_variable(efi_char16_t *name, efi_guid_t *vendor,
				  u32 attr, unsigned long data_size,
				  void *data);
efi_status_t xen_efi_query_variable_info(u32 attr, u64 *storage_space,
					 u64 *remaining_space,
					 u64 *max_variable_size);
efi_status_t xen_efi_get_next_high_mono_count(u32 *count);
efi_status_t xen_efi_update_capsule(efi_capsule_header_t **capsules,
				    unsigned long count, unsigned long sg_list);
efi_status_t xen_efi_query_capsule_caps(efi_capsule_header_t **capsules,
					unsigned long count, u64 *max_size,
					int *reset_type);
void xen_efi_reset_system(int reset_type, efi_status_t status,
			  unsigned long data_size, efi_char16_t *data);


#ifdef CONFIG_PREEMPT

static inline void xen_preemptible_hcall_begin(void)
{
}

static inline void xen_preemptible_hcall_end(void)
{
}

#else

DECLARE_PER_CPU(bool, xen_in_preemptible_hcall);

static inline void xen_preemptible_hcall_begin(void)
{
	__this_cpu_write(xen_in_preemptible_hcall, true);
}

static inline void xen_preemptible_hcall_end(void)
{
	__this_cpu_write(xen_in_preemptible_hcall, false);
}

#endif /* CONFIG_PREEMPT */

#endif /* INCLUDE_XEN_OPS_H */